Finding the Fourth Proportional to 2,020.38, 2,788.10 and 1,136.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,020.38 : 2,788.10 = 1,136.20 : x
2. Step 2: Convert to fraction form
   2,020.38/2,788.10 = 1,136.20/x
3. Step 3: Cross multiply
   2,020.38x = 2,788.10 × 1,136.20
4. Step 4: Simplify right side
   2,020.38x = 3,167,839.22
5. Step 5: Solve for x
   x = 3,167,839.22/2,020.38
6. Step 6: Final answer
   x = 1,567.94